变截面连续钢箱梁斜桥受力特性分析  

Analysis for Mechanical Characteristics of Variable Cross-section Continuous Steel Box Girder Skew Bridges

作　　者：刘孝辉[1] 梁磊[2] 安永日[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆交通大学,重庆400074

出　　处：《公路交通技术》2015年第6期43-46,54,共5页Technology of Highway and Transport

摘　　要：当斜桥斜角角度小、桥面较宽时,其受力机理与直桥不同,若用梁单元模型对其进行分析则不能反映其实际受力状况。以3跨变截面连续钢箱梁斜桥为研究对象,建立梁单元和板单元的2种有限元模型,并对比2种模型的计算结果,分析跨中和墩顶处主梁顶板和底板的应力分布,以考察最不利工况下支座反力的分布情况。When the bevel angle of skew bridges is small and bridge deck is wide,the mechanical mechanism is different from straight bridges,so analysis for the bridges by means of the beam unit model cannot reflect the actual loading conditions. With 3- span variable cross- section continuous steel box girder skew bridges as the objects of research,this paper establishes 2 finite element models between beam unit and plate unit,and compares the calculated results of 2 models. The paper analyzes distribution of stress on top plate and baseplate of girder at midspan and pier top to investigate distribution of support reaction under the worst operating conditions.

关 键 词：钢箱梁 变截面 斜桥 连续梁 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]